Improvement in type-writing machines



O. L. SHOLES. Type-Writing Machine.

No. 207,558. Patented Aug. 27,1878.

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a To all whom itmay concern UNITED STATES PATENT O'Brien,

0. LATHAM SHOLES, OF MILQVAUKEE, WISCONSIN, ASSIGNOR TO THE TYPE VRITER COMPANY, OF NE\V YORK, N. Y.

IMPROVEMENT IN TYPE-WRITING MACHINES.

Specification forming part of Letters Patent No- 207,558, dated August 27, 1878; application filed March 27, 1878.

Be it known that I, O. LATHAMSHOLES, of Milwaukee, Wisconsin, have invented Improvements; in Type-Writing Machines, of

whichthe following is a specification:

The invention'relates to the type-bars'of type-writing machines; and its nature is in combining a type-bar which has two trunnion- .likejournals with a circular annular disk which has a radialslot through its inner periphery, and astraight journal-bcarin g groove in its upper surface on each side of said slot, and in line parallel with the chord of an arc of said disk; in combining two series of type- ;bars, those of one serieslonger than those of theother, and of which each has two trunnionlike, journal's, 'withi'a 'circnlar' annular diskwhi'ch has a series of radial slots through its inner periphery, and two concentric series of pairs of straight journal-bearing grooves in its upper surface, one series around the other, and

' each pair in line parallel with the chord of an arc of said disk, and one of each pair of each series on each side of every alternate slot; and

in combining two series of type-bars, those of one series lon ger than those of the other, and

of which-each has two trunnion-like journals, with a circular annular disk which has a series of radial slots through its inner peripher and two concentric series of pairs of straight journal-bearing grooves in its upper surface, one series around the other and in a higher or lower plane, and each pair in line parallel with the chord of an arc of said disk, and one of each pair of each series on each side of every alternate-slot.

' The accompanying drawing and following description fully illustrate the invention.

The'figures-of the drawing represent views I as follows:' Figure 1, a view of a type-writing machine; Fig. 2, a perspective view of part of a circular annular disk with a type-bar pivoted thereto; Fig. 3, a sectional view of said disk; Fig. 4, a view of another form of said disk with type-bars pivoted thereto, and Fig. 5 a view of a type-bar with trunnion-likc'jonrnals.

The description is as follows: A represents the side plates of the main frame ofa typewriting machine; B, the top plate on the side plates,A; O, a circular annular disk in a hole or recess in the top plate, B; D,.a series of radial slots through the disk 0, from the inner periphery outward; E, a-series of arms made by the slots D through the disk 0; F, a concentric series of pairs of straightjournal-bearing grooves in the upper surface and near the inner periphery of the disk 0, each pair in line parallel with the chord of an arc of said disk, and one of each pair in the arm E on each side of every alternate slot D; G, another like series of pairs ofjournal-bearing grooves in the I disk G, only farther froiil the center, and in lines across the alternate slots D; H, a typebar with a trunnion-like journal on each side, and pivoted in' a pair of theinner journal-bearing grooves F in the-disk O; H, a like typebar, only longer than the type har H, and pivoted in a pair of the outer jol'lrnal-hearin grooves G in the disk (3; I, a series of pivoted levers under the type-disk O; J, a key on the end of each pivoted lever I; K, a connectingwire attached to each key-lever I, and to the corresponding type-bar H or H abovcyL, a long axle in bearin gs across over the top plate, B M, acylindrical platen, on the long-axle L; Q, a pulley on the end of the long axle L; It, a cord attached to and wound on the pulley Q, and to the other end of which is attached a weight; and S, an inking-ribbon, fixed so as to move over the striking-point ol. the types of the type-bars H and H, and under the paper wrapped around the platen M.

The pairs of straight grooves F and G, respectively, are made to fit the pairs .of trunnion-like journals of the typebars II and II, respectively, so that in vibrating up and down the type end of either type-bar cannot move in any direction except inthe vertical plane of the radial line, cannot wabhlc, but must inevitably vibrate in the same plane, and strike v always at the same place.

By making the type-bars II longer than the type-bars- H, and the grooves G farther from the center than the grooves 1*, and putting each type-bar of each series in every alternate slot D, the type-bar journals or trnnnions may be nearly or quite twice as long as they could be it the type-bars of the two series 11 and 11 were the same length, and the grooves of the two series F and G were the same distance striking at the same place. the grooves are chords of arcs of the circle of and can never fit as bearings.

froni the center, which helps insure the vibrations of the type-bars to be always in the same planes, and the accuracy of the types always As the lines of two series of type-bars hung in difi'erent planes.

They are thus farther apart, and have more v freedom'of action, and are less liable to collide in passing one another in their vibrations.

This invention is an improvement on my" Patent No. 199,382, January 22,1878. The. journal-bearing grooves of that patent are curved, whereas in this invention they are straight. The trunnions of the type-bars are necessarily straight, and straight journals in curved bearings can touch only in two places, perfectly as in straight Therefore What I claim-is as follows:

1. The combination of a type-bar which has two trunnion-like journals with a circular an- I nulardisk which has a radial slot through its inner periphery, and a straight journal-bean ing' groove in its upper surface, on each side of said slot, and in line parallel-with the chord a of an arc of said disk, in a type-writing 'machine, substantially as described.

2. The combination of two'series of typebar's, those of one series longer than those of the other, and of which each has two trunnionlike journals, witha circular annular disk which has a series of radial slots through its inner periphery, and twoconcenti'ic series of pairs of straight jonrnal bearinggrooves in its upper surface, one series'around the other, and each pair in line parallel with the chord of an arc of said disk, and one of each pair of each series on each side of every alternate sl t, in

a type-writingmachine, substantially as. (la-- scribed.

3. The combination of two series of ty mbars, those of one series longer than those-of the other, and of which each has two trunniong like journals, with a circular annular; disk which has a series of radial slots-through its v inner periphery, and two concentric series of pairs of straight journal-bearing grooves in its upper surface, one series around the other, an d in a higher or lower plane, and each pair in line parallel with the chord of an arc of said disk, and one of each pair of each series on each; side of every alternate slot, in a typewriti-ng niaehina -substant ially as described.

Y c. LATHAM snows. 

